Arch-plate for furnaces.



J. R. FORTUNE & Pf-B. BIGELOW."

u I ARCH PLATE FOR FURNACES.

APPLIOATION FILED JULY 16,1908. I

. Patented Mar. 5, 1912.

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//%V IN VEN MRS WITNESSES:

' to a very high temperature will, in time,

rmrrnn STATESPATENT orrion. JO HN R. FORTUNE, OiF DllilTROTT, MICIL%1:T6INils vIFIEbAlV'iK/B. YBIG'EIJOW; C'HICALGO,

ARCH-PLATE FOR FURNACES.

To all whom it may concern Be it known that we, JOHN R; FORTUNE 5 troit,in the county of \Vayne and State of Michigan, and Chicago, Cook county,Illinois, respectively, have invented cert-am new and usefulImprovements in Arch-Plates for Furnaces, of which the following is aspecification, reference being had therein to the accompanying drawings.

.In automatic furnaces in which a casting or so-called arch-plate isemployed to support the furnace-arch and to form one side plates bybeing subjected to the extreme heat become in time burned out, crackedor warped so thatfit is necessary to remove and replace them. Numerousforms of archplates have been devised, SOITIBbGHIg cast with a series ofribs forming air passages through which a circulation of air is maintained to cool the plate but it has been found ,that, notwithstandingthe air circulation, the lower end of the plate which is subjectedbecome warped, cracked or burned so that it is necessary-to remove anddiscard the v f whole archr'plate and that it has also been found thatarch-plates so formed are expensive, being diflicult to cast, andrequiring complicated'cores.

The object of this invention is to provlde an arch-plate havingairpassages and so madeiand, is formed in detachable sections so that ifdamaged by the heat, the damaged sect-ion maybe removed and a. new oneput in its place, obviating the-necessity for removing anddiscarding'the entire arch-plate. To this end the-invention consists invthe construction substantially. as shown and described and particularlypointed out in the claims, reference being bad to the'accompa'nyingdrawings in which: I

Figure 1- is a perspective view] of aportion of a furnaceshowinganar'ch-plate em bodyingfthe invention, in place therein; -Fig. 2is a diagrammatic'view showing a furnace in transverse section; Fig. 3is an enlargedperspedtive detail of an arch-plate with'oneofthe-removable sections detached;

and Fig. 4 is a, transverse section of the.

same.

,As shownin the drawingsl are thei ini-f.

Specification of Letters Patent. Application filed July 16, 1908. SerialNo. 443,756.

0f the coal magazine it is found that these I constructed'that it may beeasily and cheaply Patented'Mar. 5, 1.912.

clined grate-bars supported at their lower ends upon the grate-bearer 2with their upper ends resting against the cokingplates 3 over which thecoal from the maga- 1 I zines 4 above, is shoved by the Stoker-boxes 5actuated by segments on the rock-shafts 6,

all being constructed and-arranged in the usual manner.-

I The inner sides of the coal magazines 4 are formed by the arch-plates7 embodying this invention. This arch-plate is preferably cast with avertical wall v8 having on its inner side an inwardly extendinglongitudinal rib 9 and a series of webs 10 at the upper side of saidrilrconnecting the wall and rib to brace the latter and form a series ofpockets 11 at its upper side, said-webs being given such a slant thatwhen the pockets formed bet-ween are filled with cement or othersuitable material level wit-h the slanting Supper edges of the webs, aledge. or skew seat of the desired inclination-will be formed thereby,to support the end of the upper or outerarch 12 of the furnace.

Adjacent to the lower edge of the wall 8 is a series of spaced inwardlyextending ears 13 having horizontal, laterally extending lugs or pins 14and for the purpose of.

strength and to prevent warping, webs 15- connect said ears and rib 9and said webs 15 are intermediately connected by a longitudi nal rib 16,The lower edge of the wall 8 is extended inwardly and downwardly to forma shelf or ledge 17 extending at the proper inclination to support aseries of sections 18 at the desired angle to form a skew seat orabutment for the lower or inner arch 22 of the furnace. The inwardlyextending ledge and the several spaces between the cars 13 form a seriesof pockets into which the several sections loosely fit and are held bytheir their pins-14. Each of these sections 18 are a formed with anupper side or wall provided 'with an upwardly extending rib orprojection 19 to engage the tire-brick of the arch and hold the same inplace thereon, and into gral with the inner or lower surface of thiswall is.a series of ribs 20 which form between them air passages 21opening through the inner end of the se tion. At the opposite end of thesection the upper wall and said ribs are turned upward forn'ling ahooked end to engage beneath the pins 14 on the ears and looselyinterlock the section of the furnace. These sections thus form hollowtwyers between the spaces above and below the arch and they fit looselytogether and against the ears and adjacent parts,

their upper surface forming a continuous seat fgr the inner arch. Theair passages, when the sections are in place, are open at their endsonly, their upper ends opening just belovit the rib 16 and their lowerends throu h' the lower ends of the sections, and thus hability to theirbecoming clogged with cement or other material during the constructionof the arches, is obviated.

The lower portion, or lower arch-seat of the arch-plate is subjected tothe greatest heatand is, therefore, the part which is the most liable tobe injured thereby. By making this portion of the arch-plate indetachable sections, if any portion of it becomes burned or cracked,that portion or section may be readily removed and a new section put inits place without the necessity for re-.

hewing the entire arch-plate and liability to warping and cracking dueto expansion and contraction, is eliminated, by loosely engaging thesections with their support and by providing space between the sectionssufficient to allow for such expansion. These sections may also be muchmore cheaply cast with air passages, than ribs forming air passages, canbe cast as an integral part of the whole plate, and by making the mainbody of the arch-plate in theform described, it may also be cheaplycast, thus. greatly cheapening the whole.construction of the arch-plate.

Having thus fully described our invention what we claim is: v

1. An arch plate'for automatic stokers comprising a supporting wall, andan arch seat member extending outwardly from said wall and held bygravity, loosely interlocked therewith.

2. An arch-plate comprising a supporting 'mcmber, a series of memberstogether forminga continuous arch seat, 'and means for detachablysecuring said members to the supporting member, said arch plate beingformed with air passages between said so ricso'l' members and.saidmember.

3. An arch-plate comprising a supporting member and a series of membersdetachably attached to the supporting member, each having a continuousimperl'orate upper side which sides eonjointily' "form an arch seat andsaid'members being formed with air pas sages below said side extendingupward between said menm rs and said supporting member and opening atone end along the.

. 5. An arch-plate comprising a supporting member, a plurality ofmembers .having curved ends, means on the supporting mem ber with whichsaid ends are adapted to be engaged to detachably attach said members tosaidsupporting member, and ribs on said ends engaging the supportingmember and forming air passages between said ends and said member.

6. An areh-plate consisting of a wall provided with a series of pocketsat one side having upper edges inclined relatively to the wall andadapted to receive material to form a skew seat foran arch.

7. Anarch-plate consisting, of a wall, a rib extending laterally fromsaid wall, and a series of webs connecting the rib and wall at the upperside of said rib to form a-series of pockets adapted ,to receive amaterial to form a seat for an arch. j

8. An arch-plate consisting of a wall, a rib extending outward from oneside of said wall and a series of parallel webs at the upper side ofsaid ribformed integral therewith and withsaid'wall and having straightouter edges extending at an inclination to the wall, said webs formingpockets between them adapted to be filled with a material tachablyholding the same in place upon said shelf;

10. An arch-plate comprising a vertical wall having a projectingportion, a series of spaced ears on said wall near said projectingportion, a series of members titling between said ears and seating uponthe projeeting portion of the wall, and means on the ears engaging themembers to detachably hold the same in place.

II. An arelnplate consisting of a wall, an inclined shelf upon thelower-edge of said wall, a series of detachable sections 7 shelf on thel being formed with curved ends to inclined shelf at the having cut-away1 ortions to receive the shelf and provid with air assages extendingtherethrough, said shell forming a part oi the lower wall of saidpassages, and means on the wall for engaging and detachablyholding thesections. 12. An arch lower edge of said wall, a series of spaced earson the wall eachhaving a laterally projecting member, and a series ofmembers restingupon said shell and 'together forming an arch seat, saidmembers engage the laterally extending members on the cars. 13. Anarch-plate consisting of awall, an lower end of said wall, a series ofcars extending outward from said wall adjacent to the shelf, laterallyextending pins on saidears, and a series of curved end enga reach formedwit secti'ens toqfit between the ears and rest upon the shelf, saidsections each having a rig beneath the pins and aseries of air passagesopening through the lower ends of said sec of pockets, a series oflaterally tions and upward through the curved ends oi said sectionsbetween saidears adjacent to the, wall. r

14. An arch-plate consisting of a wall, a rib extendin saidwall, We asconnectin the rib and wall aterally from one side of at theupper side ofsaid ml) to form a series extending the lower edge of said wall,

ears adjacent to said ears and rib, pins on webs connecting the ears, aninclined shelf on the lower edge of the'wall, a series ofsections'adapted-to fit between the ears and rest upon the shelf andprovided with a curved and to engage.

- beneath'the pins and each formed "with a jointly forming a continuousseat for anseries'of air passages opening through its lower end andthrough the upwardly curved upper endadjacent to the wall. i

15. An arch-plate for automatic stokers Comprising a wall extending thelength of the arch-plate, and aseries of members loosely engaged withand independently supported by saidwall and extending lat-- .erallytherefronnsaid members conjointly forming a; seat for an arch. v 1

'16. An arch-plate for automatic-Stoker's comprising a vertical wall, aseries'of mem bers supported by said wall and extending laterallytherefrom, said members conarch, and interlocking means for looselyattaching said members to said wall. 7 17. An arch-plate comprising awall extending the length thereof, a series of mem- I bers dctanhablyattached to the wall and arranged in aliucment to conjointly formv anarch scat along one sideof said Wall, said plate comprising a Wall, a,

members being formed with ribs at one sidl adjacent to said wall formingair passages between said members and wall,and means for detachablyattaching said members to the wall. a a v "y 18. In'a furnace, thecombination with a magazine, an arch abutment, supported by therewith topermit relative movement be tween the magazine and abutment, and an archsupported upon said abutment, said abutment being provided "with apassage constituting a tw er between the space above and the space belbwsaid arch,

20. In a furnace, the combination with a magazine, of an archabutmentloosely interlocked with the side wall thereof, and extendingoutwardly therefrom, the weight of said abutment maintaining the same ininterlocked engagement with the magazine wall, and an arch supportedupon said abut ment. i

21. In a furnace, the combination with a refractory arch, a fuelmagazine at one side thereof, said magazine being provided with avertical side wall having a led e extending laterally from the outer surace thereof, an arch abutment seated on said ledge, and provided with anupwardly extending portion, and a keeper on the side Wall of themagazine for loosely engaging said portion.

22. In a furnace, the combination with a magazine-having a wall providedwith a plurality of pockets, a plurality of independent archvabutmentssupported in said pockets and each loosely interlocked there- With sothat. theremay be relative 1novementbetween the magazine and theabutments, the abutinents being arrailged end to end and in closeproximity to each other,

arch seat.

In testimony whereof we afiix our signatures in presence of witnesses.

' J OHN R-FORTUNE.

FRANK B. BIGELOW.

Witnesses as tothe signature of John R.

Fortune I C. R. Srrouunv,

@TTI.) F. BAR'I'IlI-IL. Witnesses as to the signature of Frank B.Bigclowf v B. F. BONNELL, L. M. Jonasthereby forming a substantiallycontinuous

